I'd probably say sleeping because if I'm eating really good food I tend to gorge myself to the point of sickness, and that overwhelms the memory of said good food. A good night's sleep or a perfectly timed nap can be the greatest thing in the world.

Sleep is a weird thing that even too this day science really doesn't knew all that is involed in why we need it so bad. they knew what happens in sleep but why can't we accomplished that when we are awake.

When you think about how we are so tuned for survival but sleep is so important that our bodies are willing to completely shut down (thus making us vunarable to attack) to get sleep.